msm8660: Use custom audio_policy for now

Change-Id: Idb56b71024d0eaab39987979b22ad4f93b65bbf6

Conflicts:
	msm8660.mk
BoardConfigCommon: Remove EGL_NEEDS_FNW flag

I'm not using legacy EGL.
BoardConfigCommon: Enable BOARD_HAVE_PRE_KITKAT_AUDIO_BLOB